Change of taste bud?

My children do not eat papayas, more so my older one who is seven. I have tried many a times to feed this vitamin packed fruits but they wont eat them. We planted some papaya seeds about 20 months ago, and now the tree is about 6 feet tall and fruiting. We just got the 3rd fruit 2 days ago, and today it was ripe to be eaten. My older son after dinner looked at the cut papaya and said yummy picked it up and ate it. And I was totally surprised. He finished the whole bowl and I was thrilled. He has seen it grow from a seed...I am happy!!!